Better item names

At the moment it’s quite funny, when you hold an item in your hand, it says for example RoundedShelf without a space or something.
That’s why I think, for every item this should be done, that there is an ID and a DisplayName. For example for RoundShelf it would be:
shelf_round | Rounded shelf
So the game would get a completely different charm.

Proper names will come with localization at a later stage, so I’ll close this one as planned to be implemented.